1 files changed, 13 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index a6376bee4e..cae38f3470 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -32,6 +32,7 @@ namespace llvm {
 template <typename T> class SmallVectorImpl;
 class AliasAnalysis;
 class TargetInstrInfo;
+class TargetRegisterClass;
 class TargetRegisterInfo;
 class MachineFunction;
 class MachineMemOperand;
@@ -400,6 +401,18 @@ public:
   ///
   int findInlineAsmFlagIdx(unsigned OpIdx, unsigned *GroupNo = 0) const;
 
+  /// getRegClassConstraint - Compute the static register class constraint for
+  /// operand OpIdx.  For normal instructions, this is derived from the
+  /// MCInstrDesc.  For inline assembly it is derived from the flag words.
+  ///
+  /// Returns NULL if the static register classs constraint cannot be
+  /// determined.
+  ///
+  const TargetRegisterClass*
+  getRegClassConstraint(unsigned OpIdx,
+                        const TargetInstrInfo *TII,
+                        const TargetRegisterInfo *TRI) const;
+
   /// isRegTiedToUseOperand - Given the index of a register def operand,
   /// check if the register def is tied to a source operand, due to either
   /// two-address elimination or inline assembly constraints. Returns the